Mike
Ages ago, I ran across a very similar RofL to "Tpr. T.C.Pennington of the Colonial Scouts in a local second-hand shop. WO100/242 confirms my man as a member of "G" Squadron. Your man Tpr. H.Collis is shown on p.138 of the roll as "n/n Tpr. H.Collis" with RofL clasp confirmed and notation "Issued 13/6/12 to Bellair (?), Natal, S.A." Nothing in the Remarks column and no mention of any particular Squadron, unfortunately..
I agree that these are very nice medals.
Best regards
IL.